Answer:
Step-by-step explanation:
8x = 9x - 7
-x = -7
x = 7
9(7)-7= 63-7=56
8(7)= 56
13y+7+56=180
13y+63=180
13y=117
y=9
13(9)+7= 117+7= 124
5y-11+56=90
5y+45=90
5y=45
y=9
5(9)-11+9(7)-7= z
45-11+63-7=z
34+56=z
90=z
Answer:
2(2x-5)(2x+5)
Step-by-step explanation:
I think you meant to say 8x^2-50. If so then factoring this down should be easy. Since there is no x value in the middle the equation will have a positive and a negative number. This is also a perfect square therefore, this factors down to: 2(2x-5)(2x+5).
Answer:

Step-by-step explanation:
We are given the equation;

and asked to make t the subject of the formula. We simply take the term yz to the left hand side of the equation leaving t as the subject in the right hand side. Thus, the total price is equal to the down payment + total installments
Answer:
The piano is 5.1 feet wide.
To answer this question, we have to follow the next steps:
1. Subtract 13 to both sides of the equation:

2. Divide the resulting equation by 5 to both sides of the equation:

Therefore, the value that solves this equation is W = 21/5 or W = 4.2 (using a decimal expression.)